APPLICABILITY OF UAV LASER SURVEYS TO ASSESS DEFORMATION IN RIVER LEVEE SLOPES

Abstract

Recently UAV has been expanding its application to river surveys. UAV laser surveying and leveling were carried out on the river embankment surface where vegetation grows, and their difference and laser transmittance were examined. In addition, a vegetation survey on the levee was conducted to clarify the influence of the vegetation and the density of the vegetation on the surveying accuracy of UAV laser surveying. As a result, it was confirmed that in order to measure the surface shape of the embankment law surface, it is important to control the plant height to about 50 cm or less in the case of plants of the grass family with small leaf area.